Volume-adjustable manual ventilation device

Abstract

Disclosed is a manually operable volume-adjustable ventilation device. The device includes a reservoir with an inlet mechanism, an outlet mechanism, and a volume adjuster configured to move a volume adjustment limit of the reservoir and change an expressed maximum volume of the reservoir. The reservoir has a body having a plurality of movable walls defining an enclosed volume. The reservoir has an uncompressed state and a compressed state. The walls of the reservoir are movable with respect to each other, such that moving the walls expresses the volume adjustment limit of the reservoir. The walls can be operably connected by movable structures configured such that two adjacent walls are configured to rotate around substantially orthogonal axes with respect to each other when the reservoir moves from an uncompressed to a compressed state. In some embodiments, the movable structures can be hinges, such as snap-fit assembly hinges. Methods of ventilating a patient that involve the device are also disclosed.

1 . A manually operable volume-adjustable ventilation device, comprising:
 a reservoir with an inlet mechanism, an outlet mechanism, and a volume adjuster configured to move a volume adjustment limit of the reservoir and change an expressed maximum volume of the reservoir;   wherein said reservoir comprises a body having a plurality of movable walls defining an enclosed volume; wherein said reservoir has an uncompressed state and a compressed state; wherein said walls are movable with respect to each other, such that moving said walls expresses the volume adjustment limit of the reservoir; wherein said walls are operably connected by movable structures;   wherein the device has a configuration comprising at least four substantially coplanar pairs of movable walls.   
   
   
       2 . The device of  claim 1 , wherein the device has a configuration comprising at least five substantially coplanar pairs of movable walls. 
   
   
       3 . The device of  claim 1 , further comprising a sealing layer operably connected with the body of the reservoir of the device. 
   
   
       4 . The device of  claim 3 , wherein the sealing layer comprises a plurality of redundant folds between at least some of the adjacent movable walls. 
   
   
       5 . The device of  claim 1 , wherein said movable structures are configured such that two adjacent walls are configured to rotate around substantially orthogonal axes with respect to each other when the reservoir moves from an uncompressed to a compressed state. 
   
   
       6 . The device of  claim 1 , wherein a movable wall rotates around an axis that intersects one or more axes that one or more panels rotate around. 
   
   
       7 . The device of  claim 1 , further comprising a pressure valve having a control to adjust a pressure setting of the device, wherein the control comprises indicia to view a selected pressure setting selected.